A small 'note' was left on my door. It was "OPM Form 1634." It asked that I contact an National Background Investigations Bureau (NBIB) investigator at the phone number shown below. Is this legitimate and how can I confirm this?
NBIB's agents will leave OPM Form 1634 at the residence of contacts. Individuals can verify the status of an NBIB investigator by contacting NBIB Security and Safety Team at 888-795-5673 or firstname.lastname@example.org.